Mahle Rings Performance HV385 Steel Top 3.917 x 1.2MM .133RW Moly Ring Set

This set includes steel top piston rings with a moly face, designed for a 3.917 inch bore. The rings measure 1.2mm for the top ring and 0.133 inches for the oil ring, featuring a moly coating on the top ring for improved wear resistance and reduced friction. These are a well-built option for engine rebuilds where durability and performance are key.

The moly coating on the top ring helps to create a better seal against the cylinder wall, which can lead to improved compression and reduced oil consumption. This type of ring set is often chosen for performance applications or when rebuilding an engine to ensure a solid seal and long-lasting performance. It's important to note that these rings are not CARB approved and cannot be shipped to California.